Answer 1

Date objects have a replace method, which returns a date object with the newer values you input. The attributes themselves are not changeable. (today.year = 2020 would raise AttributeError)

Example:
today = datetime.datetime.now().date()
year_from_today = today.replace(year=2020)

print(year_from_today) # datetime.date(2020, 4, 10)